how do i change the password and the username of my mifi device

I have been trying to change the name and the password of my MTN broadband but the providedlink keeps asking for username and password which i don't know where to get those...

i really need password to connect to my phone

For all those who cant get to the configuration page because the back of their MiFi is scratched up and the MiFi reset all you need to do is this : -firstly make sure you have...